Sierra Nevada Challenges NASA’s Space Taxi Deal With SpaceX, Boeing

Sierra Nevada Corp. says it's challenging NASA's $6.8 billion award to Boeing and SpaceX for the development of space taxis that would transport astronauts to and from the International Space Station. Sierra Nevada had received more than $300 million from NASA for development of its Dream Chaser space plane, but lost out on further funding. In a news release, the company said there were "serious questions and inconsistencies in the source selection process." Friday was the deadline for appealing the CCtCap (Commercial Crew Transportation Capability) award, and Sierra Nevada's challenge means the Government Accountability Office will review the process. That generally takes 100 days.